第10章齒輪機(jī)構(gòu)及其設(shè)計(jì)

1、1、齒輪機(jī)構(gòu)的應(yīng)用及其分類齒輪機(jī)構(gòu)的應(yīng)用及其分類2、漸開線齒廓及其傳動(dòng)特點(diǎn)漸開線齒廓及其傳動(dòng)特點(diǎn)3、漸開線直齒圓柱齒輪的基本參數(shù)漸開線直齒圓柱齒輪的基本參數(shù)和幾何尺寸和幾何尺寸4、漸開線直齒圓柱齒輪的嚙合傳動(dòng)漸開線直齒圓柱齒輪的嚙合傳動(dòng)本章教學(xué)內(nèi)容本章教學(xué)內(nèi)容6、斜齒圓柱齒輪傳動(dòng)斜齒圓柱齒輪傳動(dòng)7、圓錐齒輪傳動(dòng)圓錐齒輪傳動(dòng)5、漸開線直齒圓柱齒輪的漸開線直齒圓柱齒輪的變位修正變位修正 對(duì)齒輪傳動(dòng)的嚙合原理有所了解，并能熟練掌握齒對(duì)齒輪傳動(dòng)的嚙合原理有所了解，并能熟練掌握齒輪的基本參數(shù)和幾何尺寸的計(jì)算方法。輪的基本參數(shù)和幾何尺寸的計(jì)算方法。本章教學(xué)目的本章教學(xué)目的： 輪齒分布在圓柱體外部且與輪齒分

2、布在圓柱體外部且與其軸線平行其軸線平行, ,嚙合的兩外齒輪嚙合的兩外齒輪轉(zhuǎn)向相反。應(yīng)用廣泛。轉(zhuǎn)向相反。應(yīng)用廣泛。 輪齒與其軸線傾斜，兩輪輪齒與其軸線傾斜，兩輪轉(zhuǎn)向相反，傳動(dòng)平穩(wěn)轉(zhuǎn)向相反，傳動(dòng)平穩(wěn), ,適合于適合于高速傳動(dòng)高速傳動(dòng), ,但有軸向力。但有軸向力。2211 vk2vk1 nnttPo22o11k rbtt發(fā)生線發(fā)生線BkOArkk漸開線漸開線基圓基圓A1B1o1kKB3o3kA2B2o2rbOACBC = A2N2 + N2B2 A1B1N1A2B2N2E2EE1C” k = tgk-k k invkrkk krbk kkvktgk-k)OABKN2N1KPC1i12=1 1/2 2

3、=O=O2 2P/ OP/ O1 1P=P=常數(shù)常數(shù)C2K12O2rb1rb2O1 O112O2rb1rb2N2N1PC1C2K= rb2 /rb1 rrbOpraseskekrfpk m=4 z=16m=2 z=16m=1 z=16 0.35 0.7 0.9 1.75 2.25 2.75 (3.25) 3.5 (3.75) 第二系列第二系列 4.5 5.5 (6.5) 7 9 (11) 14 18 22 28 (30) 36 45 0.1 0.12 0.15 0.2 0.25 0.5 0.4 0.5 0.6 0.8第一系列第一系列 1 1.25 1.5 2 2.5 3 4 5 6 8 10

4、12 16 20 25 32 40 50Orb速度方向速度方向正壓力方向正壓力方向ii iBiKiri pnpnpnhahfhBpbrrbOrarfBBrraAArbO-NisriCCs si is sb bs sa ai。esppnBhahfrrbr rf fr ra aBOpb2pb2pb2pb1pb1pb2pb1=pb2pb1pb1rb1r1O11 1rb2r2O22 2rb1r1O11 1rb1r1O11 1rb2r2O22 2rb2r2O2 2 2PN1N2B2B1PN1N2B2B1PN1N2B1B2 pb2pb1rb2r2O2rb1r1O11 12 2PN1N2B2B1 rb2r2

5、O2r1O11 12 2PN1N2rb1ra1ra1rf2rf2ca= a=r1+ + r2 =r1+ + r2a=ra1+c+rf2=r1+ha*m+c*m + r2-(ha*m+c*m)=r1+ r2 =m(z1+z2)/2 i12 = r2 /r1= r2 /r1r1 = r1r2 = r2a a O1rb2r2O2r11 12 2PN2rb1ra1rf2N1r2r1rb1rb2 r1N2v22O11N1rf1ra11 1=B1B2PN2v22r1O11N1rf1ra11 1B1B2=P： 滿足無(wú)側(cè)隙嚙合的要求滿足無(wú)側(cè)隙嚙合的要求頂隙為標(biāo)準(zhǔn)值頂隙為標(biāo)準(zhǔn)值兩齒輪的分度圓分別與各自的節(jié)圓重合

6、兩齒輪的分度圓分別與各自的節(jié)圓重合a= rf2 - c -ra1= r2+(ha*m+c*m) -c*m - r1-ha*m= r2 - r1 =m ( z2 - z1 ) /2r2 - r1 N1N2ra1ra2N1N2B1 N1N2O1rb1Prb22 21 1O2B2N2N1B1B2O1N2N1KO22 21 1pb a2N1N2O1rb1rb2O2PB2ra2ra1B1a1 ： N2O1ra1B1N1rb1rb2O2PB2ra2B2ra2 ra1ra2B2B1O1O2 B2B1 PN1O1h*amB1B2 a1PmaxmaxB1P PB2ha*m/sin=4=4 h ha a* */s

7、in2/sin2h*am=20=20, h, ha a* *=1=1 B1B2a1N2PO2ra2r rb2b2B2N1O1ra1r rb1b1B1a2a2：rb2rb20.55Pb0.45Pb0.45PbPbPbB1B2=P b = 1.45 Pb1223 12N2N1PB1B31B41.45PbB2T T單單/ / T T =B=B1 1B B2 2-2(B-2(B1 1B B2 2-p-pb b)/ B)/ B1 1B B2 2T T雙雙/ / T T雙雙雙雙單單 pb pb pbB1B2=2-2/=2-2/ =2(B=2(B1 1B B2 2- -pb)/ B)/ B1 1B B2 2

8、=(2p=(2pb b - B - B1 1B B2 2)/B)/B1 1B B2 2= 2/= 2/-1-1 ra2ra1B1 N1N2rb1Prb22 21 1O1O2B2B1B2：盤銑刀盤銑刀指狀銑刀指狀銑刀 銑刀號(hào)數(shù)銑刀號(hào)數(shù) 1 2 3 4 5 6 7 8所切齒輪齒數(shù)所切齒輪齒數(shù) 1213 1416 1720 2125 2634 3554 55134 135i=0 0 /=z/z/=z/z0 00 00 0vVrrmz/2mz/20 0v0 0Vrrmz/2mz/2tt0 0h*am=20=20c*m分度線分度線hf=(h*a+ c*)mha=h*amh*amh*amc*mm/2m/2

9、es sha=h*amhf=(h*a+ c*)msem/2PN1rbrbrO132B1B2PrbrraN1O123B2B1113O1PN1rbr4M2 B1B2N1K1P N1PP B2 z2 h2 ha a* */ / sin2 2 =20=20, h, ha a* *=1=1， z zminmin=17=17Brb N1O1Prb1N1 rb3 N1B2rh*amzminmin2 h2 ha a* */ / sin2 2 PN1=rsin =mzsin/2 PB2=h ha a* *m/m/sinzminrPrb1N1B2，rPrb1N1B2B2。rPrb1N12211B2 rb2N1B2

10、Ft =M/rFr2Fn221Fn1Fr1 N1B2B2xmxmQN1Qha*m-xm 或或 xmha*m- N1Q N N1 1Q QN N1 1 PsinPsinxha*- zsin2/2mzsinmzsin2 2/2/2xmxmxminmrN1O1PB2h*amrsinrsinsinsinha= (ha*+x)mhahfs=m/2 + 2xmtgxmtgKJIxmxmPN1O1rbS=S=m/2s e=m/2 2xmtgB2AKKAKKbAAtg=d / lddbbtgb=db / lltgb /tg=db/ d =costtgb = tg costd d a、 b 、a 、 、h*at

11、 、 、xt 。請(qǐng)思考請(qǐng)思考Bdpt pnnta b c= =n abc= =t bacabtgn =a c/a btgt =ac/ab h*atmh/n*anmh cos*ant= = =*tc/n*nmctb bcos*ncm = = =tb bcosnxx = =d=dbcos/ntzmzm=bdtbcosdd =aht*atn*anamhmhh=t*t*atn*n*anf)()(mchmchh=fhhahfh=hadn*ant*ata)2cos/()2(2mhzmhzhdda=bn*n*ant*t*atff)2cos/()22(2mchzmchzhdd=bfdt*tn*nmcmc=bc

12、os2/)(2/ )(n2121mzzdd= c =ca a =mn1=mn2 ，n1 =n1 tgtgb bdb /l L LL LB B1 1B B1 1B BB B2 2B B2 2B BB B2 2B B2 2b bb bdcost /lB B1 1B B1 1 cd zv 2r rv /mn 2 /mn： zmin=z zvmincos3d/mn cos2zmzmt/ / m mn cos2z/z/ cos3abn nn na2/b=d/2cos2 F Fn nF Ft tF Ft tF Fn n F Fa aF Fa a=90=90O1 O2 rrvrvp1 11 1RefO1ef（輔助圓錐）（輔